Re: [v6ops] Need ref to 3GPP spec for the use of DHCPv6 Prefix Delegation, e.g. for smartphone tethering

[Alexandru Petrescu <[e-mail]>]

Le 08/10/2013 10:49, Vízdal Aleš a écrit :
>>> The GGSN/PGW is UEs next-hop as the traffic is tunnelled in GTP
>>> through all the intermediate nodes.
>>
>> Ah, right, there is a GTP tunnel above all the intermediary IP
>> nodes.
>>
>> However, even when a tunnel is dynamically set up, a routing table
>>  entry is added in the Relay's routing table (or other similar
>> entry).  The parameters of that entry necessarily include, among
>> others, the prefix which is allocated.
>>
>> No?
>
> The tunnel stays up for the lifetime of the PDP/PDN context.

Ok.

> There is no relay in the 3GPP access architecture.

Ok.

> If the tunnel drops, the PGW/GGSN will remove the route from their
> routing table, once a new tunnel is setup the routing table is
> updated accordingly.

The route associated with that tunnel should contain a parameter 
containing the Delegated Prefix.  When there is no delegated prefix, 
that route entry should be updated.

The tunnel could stay up but only for the Smartphone.  Or it could stay 
up for both the Smartphone _and_ the Hosts in the smartphone's LAN. 
These are two different things.

Alex


>
>> Alex
>
> Ales
>
>